{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250218135018-e644e3c8e393 or later.","affected":[{"fixed":"10.4.3","introduced":"10.4.0"},{"fixed":"10.3.4","introduced":"10.3.0"},{"fixed":"9.11.9","introduced":"9.11.0"},{"fixed":"8.0.0-20250218135018-e644e3c8e393","introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2025-27933"],"ecosystem":"Go","epss":0.00211,"exploited":false,"fixed_versions":["10.4.3","10.3.4","9.11.9","8.0.0-20250218135018-e644e3c8e393"],"ghsa_id":"GHSA-h5v9-xw2g-7hrq","id":"tcs_01M5KFBZ8TDHAM8NS2TVB4X48N","modified_at":"2026-09-10T03:50:23.194301319Z","published_at":"2025-03-21T09:30:35Z","references":["https://osv.dev/vulnerability/GHSA-h5v9-xw2g-7hrq","https://nvd.nist.gov/vuln/detail/CVE-2025-27933","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GHSA-h5v9-xw2g-7hrq","url":"https://osv.dev/vulnerability/GHSA-h5v9-xw2g-7hrq"}],"summary":"Mattermost allows members with permission to convert public channels to private and convert private to public"}